65572131966 has 24 divisors (see below), whose sum is σ = 144150308232. Its totient is φ = 19870342800.

The previous prime is 65572131923. The next prime is 65572131991. The reversal of 65572131966 is 66913127556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45159145 + ... + 45160596.

It is an arithmetic number, because the mean of its divisors is an integer number (6006262843).

Almost surely, 2^65572131966 is an apocalyptic number.

65572131966 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

65572131966 is an abundant number, since it is smaller than the sum of its proper divisors (78578176266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65572131966 is a wasteful number, since it uses less digits than its factorization.

65572131966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90319768 (or 90319757 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 51.

The spelling of 65572131966 in words is "sixty-five billion, five hundred seventy-two million, one hundred thirty-one thousand, nine hundred sixty-six".